chore: move identity entity in its own folder

Signed-off-by: Philip Molares <philip.molares@udo.edu>

src/identity/identity.entity.ts

@@ -0,0 +1,111 @@
+/*
+ * SPDX-FileCopyrightText: 2021 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+import {
+  Column,
+  CreateDateColumn,
+  Entity,
+  ManyToOne,
+  PrimaryGeneratedColumn,
+  UpdateDateColumn,
+} from 'typeorm';
+
+import { User } from '../users/user.entity';
+import { ProviderType } from './provider-type.enum';
+
+/**
+ * The identity represents a single way for a user to login.
+ * A 'user' can have any number of these.
+ * Each one holds a type (local, github, twitter, etc.), if this type can have multiple instances (e.g. gitlab),
+ * it also saves the name of the instance. Also if this identity shall be the syncSource is saved.
+ */
+@Entity()
+export class Identity {
+  @PrimaryGeneratedColumn()
+  id: number;
+
+  /**
+   * User that this identity corresponds to
+   */
+  @ManyToOne((_) => User, (user) => user.identities, {
+    onDelete: 'CASCADE', // This deletes the Identity, when the associated User is deleted
+  })
+  user: User;
+
+  /**
+   * The ProviderType of the identity
+   */
+  @Column()
+  providerType: string;
+
+  /**
+   * The name of the provider.
+   * Only set if there are multiple provider of that type (e.g. gitlab)
+   */
+  @Column({
+    nullable: true,
+    type: 'text',
+  })
+  providerName: string | null;
+
+  /**
+   * If the identity should be used as the sync source.
+   * See [authentication doc](../../docs/content/dev/authentication.md) for clarification
+   */
+  @Column()
+  syncSource: boolean;
+
+  /**
+   * When the identity was created.
+   */
+  @CreateDateColumn()
+  createdAt: Date;
+
+  /**
+   * When the identity was last updated.
+   */
+  @UpdateDateColumn()
+  updatedAt: Date;
+
+  /**
+   * The unique identifier of a user from the login provider
+   */
+  @Column({
+    nullable: true,
+    type: 'text',
+  })
+  providerUserId: string | null;
+
+  /**
+   * Token used to access the OAuth provider in the users name.
+   */
+  @Column({
+    nullable: true,
+    type: 'text',
+  })
+  oAuthAccessToken: string | null;
+
+  /**
+   * The hash of the password
+   * Only set when the type of the identity is local
+   */
+  @Column({
+    nullable: true,
+    type: 'text',
+  })
+  passwordHash: string | null;
+
+  public static create(
+    user: User,
+    providerType: ProviderType,
+    syncSource = false,
+  ): Identity {
+    const newIdentity = new Identity();
+    newIdentity.user = user;
+    newIdentity.providerType = providerType;
+    newIdentity.syncSource = syncSource;
+    return newIdentity;
+  }
+}